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Publication numberUS4920365 A
Publication typeGrant
Application numberUS 07/336,775
Publication dateApr 24, 1990
Filing dateApr 12, 1989
Priority dateApr 25, 1988
Fee statusLapsed
Also published asDE8816402U1, EP0341443A1
Publication number07336775, 336775, US 4920365 A, US 4920365A, US-A-4920365, US4920365 A, US4920365A
InventorsJuergen Marx, Artur Weich
Original AssigneeSiemens Aktiengesellschaft
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electronic digital timepiece having a separate key for controlling the switching of the display from standard to daylight savings time
US 4920365 A
Abstract
A colon appearing on the display of an electronic digital timepiece between the hours and the minutes display serves as a display means for the time complexes "daylight-saving time" and "standard time", One point of the colon is surrounded by a first symbol for daylight-saving time and the other point is surrounded with a second symbol for standard time. In accordance with the selected time complex, these symbols appear on the display either continuously or for a period of time upon being recalled.
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Claims(2)
What is claimed is:
1. An electronic digital timepiece having a display for the digital display of the actual time-of-day, said display having a colon located between an hours display and a minutes display and flashing in a seconds cycle, said timepiece further having a plurality of keys to cyclically shift the hours and minutes and to adjust any additional data in said display, the timepiece comprising:
(a) a separate key for controlling the switching of the display from daylight saving time to standard time and from standard time to daylight saving time;
(b) said colon serving as a means for displaying both daylight saving time and standard time by further comprising:
(i) a first symbol indicating daylight saving time associated with one point of the colon;
(ii) a second symbol indicating standard time associated with the other point of the colon wherein one of said first and second symbols is selected and appears continuously on the display;
(c) said selected symbol functioning to only appear on the display for a period of time upon recalling the selected symbol;
(d) said timepiece further functioning wherein upon resetting the display, the first and second symbols flash without the colon points, and further wherein, after activating the separate key for daylight saving time or standard time, the selected symbol appears statically on the display and the colon points flash; and
wherein the actual time-of-day can only be adjusted after the selected symbol is entered.
2. A digital timepiece according to claim 1, further comprising a computer controlled program setting device having a switch for the on/off control of an electric device at a switching time and wherein the first and second symbols are extinguished and the switching time appears with the colon being statically displayed when the time-of-day appears as a switching point to switch the electric device on and off.
Description
FIELD OF THE INVENTION

The invention relates to an electronic digital timepiece and, more particularly to a timepiece having a display for the digital display of the actual time-of-day and other possible data. The display includes means for indicating whether the display is showing standard or daylight saving time, i.e., the "time complex".

BACKGROUND OF THE INVENTION

Prior art timepieces generally have had the problem of requiring a complicated adjustment procedure to change over from the time complex for daylight-saving time to that for standard time. To simplify this procedure, an electronic digital clock, as shown from the EP-A-0 197 336, has a separate selector button by which the hour display can be adjusted by ±one hour. However, there is no indication whether the time displayed is for daylight-saving time or for standard time. Each time the selector button is pressed, the hour display is alternately switched ahead or back by one hour. A problem develops if the button is pressed twice by mistake. This has the effect of switching the display back to the original time complex. The use of separate luminous markings to display the currently selected time complex poses a problem as the timepieces usually only have very small displays and therefore cannot accommodate such an additional making.

SUMMARY OF THE INVENTION

The present invention provides a timepiece having a display marking for the time complexes designated daylight-saving time and standard time. The display marking is closely associated with the timepiece display and does not utilize any additional space on the display.

A further advantage of the present invention ensures that the time-of-day can only be entered on the display, if the selected time complex (daylight-saving time/standard time) has been entered first. Thus, the entered time is clearly assigned to one of the time complexes. Yet another advantage of the present invention is that the timepiece, by use of the display features, prevents confusion between the actual time of day and the entered switching times when the timepiece is used as a timer switch.

BRIEF DESCRIPTION OF THE DRAWINGS

The FIGURE illustrates a timepiece display in accordance with the present invention.

DETAILED DESCRIPTION

Referring to the FIGURE, there is shown a panel 1 of an electronic digital clock containing an operating element 2 and a display 3. It is apparent that the FIGURE illustrates only one example of a clock panel and that another design may be used without departing from the principles of the invention. The actual time-of-day "12:43" appears on this display in a standard seven segment display form. A colon 4, 5 is located between the hours and minutes display. On the upper edge of the display 3, luminous indicators are provided for each of the days-of-the-week, as indicated by the abbreviations (SU-SA) on the cover plate 1. The operating element 2 contains four buttons designated in sequence as: "SO/WI" for the switching from daylight-saving time to standard time; "DAY" for the cyclical switching to each of the days-of-the-week; "HOUR" for switching the hour display; and "MINUTE" for switching the minute display. Each of the points 4, 5 of the colon between the hour and minute display is encircled by a symbol designated by 6 for standard time and 7 for daylight-saving time. Both symbols can be alternately controlled by the SO/WI-button and, when activated, are constantly lighted. Further, a cpu 8 is shown coupled to the timepiece for use when the timepiece operates as a timer switch.

In the operation and initialization or setting of the display, the operator starts from an initial state attained by simultaneously pressing both the "HOUR" and "MINUTE" buttons. This has the effect of bringing the day-of-the-week display to Sunday SU and the hour and minute display to zero "00:00". At this point, the symbols for standard time 6 and for daylight saving time 5 flash on and off. The selected symbol (6 or 7) is then constantly lighted while the symbol, which is not selected, goes out. During the time period that one of the symbols is constantly lighted, the colon flashes. At this point in the procedure, the actual day-of-the-week can be adjusted with the "DAY" button, and the hours and minutes of the actual time-of-day can be adjusted with the hours "HOUR" and minutes "MINUTE" buttons. By repeatedly activating the SO/WI button, the operator can switch from daylight saving time to standard time and back again. Thereby, with each activation, the respective symbol 6 or 7 lights up and the hour display is changed by ±1 hour. The design of the circuitry necessary to perform the functions of the timepiece is well known to those of ordinary skill in the art.

Furthermore, the timepiece of the present invention can be used as a timer switch clock. The purpose of timer clocks is to connect and disconnect electrically controllable apparatuses, e.g., space heating systems, at given pre-set times. The electronic timer switch has the advantage of expanded use over mechanical timer switches. For example, the time-dependent connecting and disconnecting at different times on individual weekdays is more easily accomplished. It is thus possible to store a timer program for connecting and disconnecting on each individual weekday or a group of weekdays and to access it on the individual weekdays. The timer switch uses one additional button (not shown) to assign the appropriate times-of-day and days-of-the-week to the desired switching on or off points. For purpose of the timer switch, then, an additional button must be arranged in a well-known manner, so that when it is pressed, the colon lights up statically. Also, the days, hours and minutes can be adjusted appropriately with the corresponding buttons, as provided above. After a certain elapsed time from when the adjustment procedure for the switching times has been completed, or by selecting an additional button, one can switch back to the "actual time of the day".

The time-of-day and day-of-the-week can also be adjusted with a single button. Using the single button, i.e., by pressing the button, the operator first selects the display of the minutes, and, after the minutes flash, the hour display. After the hour display flashes, the day-of-the-week is then selected. Then, the button is held down again, until the minutes finish flashing and the respective hour appears on the display, whereby the operator presses the button again to adjust the minutes. As stated above, the design of the circuitry to perform these functions is well known to those of ordinary skill in the art.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3855783 *Apr 20, 1972Dec 24, 1974Optel CorpDigital electronic timepiece
US4077032 *Jan 7, 1976Feb 28, 1978Volkman S AlanElectronic display apparatus
US4253169 *Feb 7, 1978Feb 24, 1981Salah Ibrahim MElectronic calculation watch with digital display
US4582434 *Apr 23, 1984Apr 15, 1986Heath CompanyTime corrected, continuously updated clock
EP0197336A1 *Mar 10, 1986Oct 15, 1986Siemens AktiengesellschaftControl unit for a time switch
Non-Patent Citations
Reference
1 *Patent Abstracts of Japan, vol. 1, No. 86, 8/11/77, p. 1914 E 77; and JP A 52 21863 (Suwa Seikosha K.K.), 2/18/77.
2Patent Abstracts of Japan, vol. 1, No. 86, 8/11/77, p. 1914 E 77; and JP-A-52-21863 (Suwa Seikosha K.K.), 2/18/77.
3 *Patent Abstracts of Japan, vol. 6, No. 66 (P 112) 944 , 4/27/82; and JP A 57 6387 (Rhythm Tokei Kogyo K.K.), 1/13/82.
4Patent Abstracts of Japan, vol. 6, No. 66 (P-112) [944], 4/27/82; and JP-A-57-6387 (Rhythm Tokei Kogyo K.K.), 1/13/82.
5 *Patent Abstracts of Japan, vol. 6, No. 79 (P 115) 957 , 5/18/82; and JP A 57 16383 (Rhythm Tokei Kogyo K.K.), 1/27/82.
6Patent Abstracts of Japan, vol. 6, No. 79 (P-115) [957], 5/18/82; and JP-A-57-16383 (Rhythm Tokei Kogyo K.K.), 1/27/82.
Referenced by
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US5247284 *Apr 30, 1991Sep 21, 1993International Business Machines CorporationGraphical method of inputing time values
US6229765 *Mar 11, 1999May 8, 2001Rm-Ic Telepathy Ltd.Electronic sunrise-dependent timepiece
US7369462Sep 27, 2005May 6, 2008Quartex, Division Of Primex, Inc.Wireless synchronous time system with solar powered transceiver
US7394726Feb 17, 2006Jul 1, 2008Quartex, Division Of Primex, Inc.Time keeping system with automatic daylight savings time adjustment
US7411869Nov 2, 2004Aug 12, 2008Quartex, Division Of Primex, Inc.Wireless synchronous time system
US7457200Jun 25, 2004Nov 25, 2008Quartex, Division Of Primex, Inc.Wireless synchronous time system
US7480210Apr 4, 2008Jan 20, 2009Quartex, Division Of Primex, Inc.Wireless synchronous time system
US7499379Apr 4, 2008Mar 3, 2009Quartex, Division Of Primax, Inc.Wireless synchronous time system
US7539085Apr 4, 2008May 26, 2009Quartex, Division Of Primex, Inc.Wireless synchronous time system
US8335134Oct 21, 2010Dec 18, 2012Rufus SneedClock device with daylight saving time adjustment
US20030169641 *Mar 8, 2002Sep 11, 2003Quartex A Division Of Primex, Inc.Time keeping system with automatic daylight savings time adjustment
US20030169642 *Sep 13, 2002Sep 11, 2003Quartex, Inc., A Division Of Primex, Inc.Time keeping system with automatic daylight savings time adjustment
US20040100874 *Nov 22, 2002May 27, 2004Chang Chee AnnElectronic device with interchangeable faceplate
US20050058157 *Jun 25, 2004Mar 17, 2005Quartex, Inc.Wireless synchronous time system
US20050111304 *Nov 2, 2004May 26, 2005Quartex, Inc.Wireless synchronous time system
US20050162981 *Mar 22, 2005Jul 28, 2005Quartex, Inc., A Division Of Primex, Inc.Time keeping system with automatic daylight savings time adjustment
US20060058926 *Sep 27, 2005Mar 16, 2006Quartex, A Division Of Primex, Inc.Wireless synchronous time system with solar powered transceiver
US20060158963 *Feb 17, 2006Jul 20, 2006Quartex, Inc., A Division Of Primex, Inc.Time keeping system with automatic daylight savings time adjustment
US20080159080 *Mar 12, 2008Jul 3, 2008Abbott Mark AWireless synchronous time system with solar powered transceiver
US20080198698 *Apr 4, 2008Aug 21, 2008Pikula Michael AWireless synchronous time system
US20080212412 *Apr 4, 2008Sep 4, 2008Pikula Michael AWireless synchronous time system
US20080212413 *Apr 4, 2008Sep 4, 2008Pikula Michael AWireless synchronous time system
US20080316870 *Aug 27, 2008Dec 25, 2008Pikula Michael AWireless synchronous time system
EP1571508A1 *Mar 1, 2004Sep 7, 2005Duteck Industrial Co., Ltd.Method of displaying world time with automatic correction of daylight saving time in a movement
Classifications
U.S. Classification368/242, 968/977, 368/31, 368/187, 368/34, 968/938
International ClassificationG04G9/00, G04G15/00
Cooperative ClassificationG04G9/0076, G04G15/006
European ClassificationG04G15/00C, G04G9/00G
Legal Events
DateCodeEventDescription
Apr 12, 1989ASAssignment
Owner name: SIEMENS AKTIENGESELLSCHAFT, MUNCHEN, GERMANY, A CO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:MARX, JUERGEN;WEICH, ARTUR;REEL/FRAME:005062/0668
Effective date: 19890404
Apr 24, 1994LAPSLapse for failure to pay maintenance fees
Jul 5, 1994FPExpired due to failure to pay maintenance fee
Effective date: 19940705